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a) Turn the connecting section clockwise until resistance is met
b) The wire guide should go in
6.4
Gas nozzle
There is a spatter protector fitted inside the gas nozzle. This must be in position
during welding in order to prevent the welding spatter jamming and thereby causing
a short circuit in the swan neck.
Gas nozzles with larger and smaller openings are available as accessories for each
type of welding torch. See on page 25--29.
6.5
Gas protection
Several factors come into play for good gas protection. The most important ones are:
1.
Selection of shielding gas
2.
Set flow quantity
3.
Set welding current
4.
Position of welding joint
5.
Type of welding joint
6.
Smoke evacuation on wel-
ding torch
7.
Angle of welding torch to
the job.
6.6
Gas flow meter
A gas flow meter to measure gas flow through the welding torch is available as an
accessory se on page 31.
6.7
Centrovac
Integrated smoke evacuation
You can tailor the level of suction by opening the damper on the topside of the
handle.
Suction source for welding torches with integrated smoke evacuation
In order to achieve full suction power, the smoke evacuation welding torch must be
connected to a suction source where pressure does not fall below 15 kPa.
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Mixed gas and Argon require a greater flow than carbon
S
dioxide
See Technical data (to be measured at the gas nozzle).
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High welding currents require greater gas flows.
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A vertical position requires greater gas flow
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External corner joints require a greater gas flow than butt
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joints. Conversely, fillet joints require a lower gas flow.
Using smoke evacuation increases the need for inert gas by
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10--12%
Angling the welding torch at less than 45˚ may result in poor
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gas protection.
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